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RYOBI OUTDOOR PRODUCTS warrants each new
RYOBI Product for two (2) years according to the
following terms.

This warranty extends to the original retail purchaser
only and commences on the date of original retail
purchase.

Any part of the RYOBI Product manufactured or
supplied by RYOBI and found in the reasonable
judgement of RYOBI to be defective in material or
workmanship will be repaired or replaced by an
authorized RYOBI service dealer without charge 
for parts and labor.

The RYOBI Product including any defective part 
must be returned to an authorized service dealer
within the warranty period. The expense of delivering
the RYOBI Product to the dealer for warranty work
and the expense of returning it back to the owner
after repair or replacement will be paid for by the
owner. RYOBI’s responsibility in respect to claims is
limited to making the required repairs or replacements
and no claim of breach of warranty shall be cause 
for cancellation or rescission of the contract of sale 
of any RYOBI Product. Proof of purchase will be
required by the dealer to substantiate any warranty
claim. All warranty work must be performed by an 
authorized RYOBI service dealer.

This warranty is limited to ninety (90) days from 
the date of original retail purchase for any RYOBI
Product that is used for rental or commercial
purposes, or any other income-producing purpose.

This warranty does not cover any RYOBI Product 
that has been subject to misuse, neglect, negligence,
or accident, or that has been operated in any way
contrary to the operating instructions as specified in
the RYOBI Operator’s Manual. This warranty does not
apply to any damage to the RYOBI Product that is the
result of improper maintenance or to any RYOBI
Product that has been altered or modified so as to
adversely affect the product's operation, performance
or durability or that has been altered or modified so
as to change its intended use. The warranty does not
extend to repairs made necessary by normal wear or
by the use of parts or accessories which are either
incompatible with the RYOBI Product or adversely
affect its operation, performance or durability.

In addition, this warranty does not cover:
A. Tune-ups - Spark Plugs, Carburetor 

Adjustments, Filters

B. Wear items - Bump Knobs, Outer Spools,

Cutting Line, Inner Reels, Starter Pulley,
Starter Ropes, Drive Belts

RYOBI reserves the right to change or improve the
design of any RYOBI Product without assuming any
obligation to modify any product previously
manufactured.

ALL IMPLIED WARRANTIES ARE LIMITED IN
DURATION TO THE TWO (2) YEAR WARRANTY
PERIOD OR NINETY (90) DAYS FOR PRODUCTS
USED FOR ANY COMMERCIAL PURPOSE.
ACCORDINGLY, ANY SUCH IMPLIED
WARRANTIES INCLUDING MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR
OTHERWISE, ARE DISCLAIMED IN THEIR
ENTIRETY AFTER THE EXPIRATION OF THE
APPROPRIATE TWO-YEAR OR NINETY DAY
WARRANTY PERIOD. RYOBI’S OBLIGATION
UNDER THIS WARRANTY, IS STRICTLY AND
EXCLUSIVELY LIMITED TO THE REPAIR OR
REPLACEMENT OF DEFECTIVE PARTS, AND ROP
DOES NOT ASSUME OR AUTHORIZE
ANYONE TO ASSUME FOR THEM ANY OTHER
OBLIGATION. SOME STATES DO NOT ALLOW
LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE LIMITATION
MAY NOT APPLY TO YOU.

RYOBI ASSUMES NO RESPONSIBILITY FOR
INCIDENTAL, CONSEQUENTIAL OR OTHER
DAMAGES INCLUDING, BUT NOT LIMITED
TO EXPENSE OF RETURNING THE RYOBI
PRODUCT TO AN AUTHORIZED SERVICE
DEALER AND EXPENSE OF DELIVERING IT BACK
TO THE OWNER, MECHANIC’S TRAVEL TIME,
TELEPHONE OR TELEGRAM CHARGES, RENTAL
OF A LIKE PRODUCT DURING THE TIME
WARRANTY SERVICE IS BEING PERFORMED,
TRAVEL, LOSS OR DAMAGE TO PERSONAL
PROPERTY, LOSS OF REVENUE, LOSS OF USE 
OF THE PRODUCT, LOSS OF TIME, OR
INCONVENIENCE. SOME STATES DO NOT ALLOW
THE EXCLUSION OR LIMITATION OF INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SO THE ABOVE
LIMITATION OR EXCLUSION MAY NOT APPLY TO
YOU.

This warranty gives you specific legal rights, and
you may also have other rights which vary from
state to state.

This warranty applies to all RYOBI Products
manufactured by RYOBI and sold in the United
States and Canada.

To locate your nearest service dealer dial
1-800-345-8746 in the United States or
1-800-265-6778 in Canada.

RYOBI OUTDOOR PRODUCTS

550 N. 54th Street

Chandler, AZ 85226 U.S.A.

RYOBI CANADA INC.

275 Industrial Rd

Cambridge, Ontario N1R 6K2 CANADA

LIMITED TWO-YEAR WARRANTY

SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

FOR QUESTIONS CALL 1-800-345-8746 IN U.S.

OR 1-800-265-6778 IN CANADA

OPERATOR’S MANUAL PART NO. 182091

REV. A (7714)

PRINTED IN U.S.A.

9/98

Summary of Contents for 780r

Page 1: ...FOR QUESTIONS CALL 1 800 345 8746 in U S or 1 800 265 6778 in CANADA www ryobi com IMPORTANT MANUAL DO NOT THROW AWAY OPERATOR S MANUAL 2 Cycle Gas Trimmer Brushcutter 780r 790r...

Page 2: ...4 651 422 4 505 040 4 463 498 4 369 742 4 342 236 4 223 441 2 125 688 D 249 012 D 239 329 OTHER PATENTS PENDING INTRODUCTION 2 TABLE OF CONTENTS I California Emission Regulations 3 II Rules for Safe...

Page 3: ...ory equipped with a spark arrestor If these items are required in your area ask your LOCAL SERVICE dealer to install the Optional Accessory Part 180030 Spark Arrestor Kit FOR QUESTIONS CALL 1 800 345...

Page 4: ...utting attachment is properly installed and securely fastened Be sure the cutting attachment shield is properly attached and positioned as recommended Failure to so can result in personal injury to th...

Page 5: ...sure the cutting attachment is not in contact with anything before starting the unit Use the unit only in daylight or good artificial light Avoid accidental starting Be in the starting position whene...

Page 6: ...t are bent warped cracked or broken Do not sharpen the cutting blade Sharpening the blade can cause the blade tip to break off while in use This can result in severe personal injury Replace the blade...

Page 7: ...conjunction with other symbols or pictographs PRIMER BULB Push primer bulb fully and slowly 5 to 7 times KEEP BYSTANDERS AWAY WARNING Keep all bystanders especially children and pets at least 50 feet...

Page 8: ...When turned off they remain hot for a short time TRIMMER BRUSHCUTTER SAFETY WARNING Thrown objects and rotating cutter can cause severe injury Keep bystanders especially children and pets at least 50...

Page 9: ...light bush of up to 1 2 inch in diameter Other accessories may be used with the 790r See list of add ons on page 17 Handle Hardware Primer Bulb Air filter Muffler Cover Fuel Cap Throttle Control Powe...

Page 10: ...d correctly 3 Place the clamps and j handle the over the shaft housing and onto the bottom clamp 4 Hold each hex nut in the bottom clamp recess with a finger Start screws with a large Phillips screwdr...

Page 11: ...ld should NOT be installed when operating the unit with a blade Remove the cutting attachment shield before removing or installing the blade Remove the cutting attachment shield from the shield mount...

Page 12: ...on a work bench Remove the Cutting Attachment Shield See Removing and Installing Cutting Attachment Shield Pg 11 Remove the Cutting Attachment WARNING The gear housing gets hot with use and can resul...

Page 13: ...t or operate this unit with the locking rod in the locking rod slot 10 Remove the cutting blade cover by un snapping the plastic lock on the cover and pulling it from the blade Store the cover for fut...

Page 14: ...E CUTTING BLADE AND INSTALL THE CUTTING ATTACHMENT Remove the Cutting Blade WARNING To avoid serious personal injury always wear gloves while handling or installing the blade 1 Install the cutting bla...

Page 15: ...oose to use a blended fuel or its use is unavoidable follow recommended precautions Always use fresh fuel mix per your operator s manual Use the fuel additive STA BIL or an equivalent Always agitate t...

Page 16: ...on Fig 18 STARTING INSTRUCTIONS WARNING Avoid accidental starting Be in the starting position when pulling the starter rope Fig 20 The operator and unit must be in a stable position while starting to...

Page 17: ...these optional add ons Blower Vacuum BV720r Cultivator GC720r Edger LE720r Hedgetrimmer HS720r Snowthrower ST720r Straight Shaft Trimmer SS725r Sweeper Blower SB720r Tree Pruner TP720r Turbo Blower T...

Page 18: ...und or hard soil If line release is attempted in tall grass the engine may stall Always keep the trimming line fully extended Line release becomes more difficult as the cutting line becomes shorter NO...

Page 19: ...trimming is accomplished by removing all vegetation around trees posts fences etc Rotate the whole unit so that the cutting attachment is at a 30 angle to the ground Fig 26 OPERATING INSTRUCTIONS 19...

Page 20: ...ols or skills If you are unsure about these procedures take your unit to an authorized service dealer MAINTENANCE SCHEDULE These required maintenance procedures should be performed at the frequency st...

Page 21: ...lt inside the Bump Knob to make sure it moves freely Replace the Bump Knob if damaged NOTE A Bump Knob Part 180814 can be purchased from you local authorized dealer 4 Use a clean cloth to clean the th...

Page 22: ...er between the two lines to stop the lines from overlapping Do not overlap the ends of the line NOTE Failure to wind the line in the direction indicated will cause the cutting attachment to operate in...

Page 23: ...he inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the spool 7 Hold the inner reel in plac...

Page 24: ...o not over tighten Do not force 4 Apply enough clean SAE 30 oil to lightly coat the filter Fig 39 5 Squeeze the filter to spread and remove excess oil Fig 40 Air Filter 3 Wash the filter in detergent...

Page 25: ...prevent serious personal injury If after checking the fuel mixture and cleaning the air filter the engine still will not idle adjust the idle speed screw as follows 1 Start the engine and let it run a...

Page 26: ...e air gap at 0 020 in 0 5 mm using a feeler gauge Fig 42 CAUTION Do not sand blast scrape or clean electrodes Grit in the engine could damage the cylinder 4 Install a correctly gaped spark plug in the...

Page 27: ...ventilated area Store the unit out of the reach of children LONG TERM STORAGE If the unit will be stored for an extended time use the following storage procedure 1 Drain all fuel from the fuel tank a...

Page 28: ...switch to ON Fill fuel tank Press primer bulb fully and slowly 5 7 times Use starting procedure with choke lever in the RUN position Pg 16 Drain fuel tank Add fresh fuel mixture Replace or clean the...

Page 29: ...tarter Auto Rewind Muffler Baffled with Guard Throttle Manual Spring Return Fuel Tank Capacity 18 oz 530 ml Fuel Tank HD Polyethylene DRIVE SHAFT CUTTING ATTACHMENT Drive Shaft Housing Steel Tube Thro...

Page 30: ...NOTES 30...

Page 31: ...he engine or equipment is delivered to the retail purchaser The manufacturer warrants to the initial owner and each subsequent purchaser that the engine is free from defects in material and workmanshi...

Page 32: ...tion this warranty does not cover A Tune ups Spark Plugs Carburetor Adjustments Filters B Wear items Bump Knobs Outer Spools Cutting Line Inner Reels Starter Pulley Starter Ropes Drive Belts RYOBI res...

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